Ordered P3HT/PCBM Heterostructured Organic Photodiode for Radiation Detection using Direct Nanoimprint Lithography

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  • Tada Kazuhiro
    Department of Electrical and Control Systems Engineering, Toyama National College of Technology
  • Takada Eiji
    Department of Electrical and Control Systems Engineering, Toyama National College of Technology
  • Fujii Kazuo
    Department of Electrical and Control Systems Engineering, Toyama National College of Technology
  • Uemura Kimiaki
    Department of Physics and Electronics Engineering, Graduate School of Engineering
  • Tomohiro Kohei
    Department of Physics and Electronics Engineering, Graduate School of Engineering
  • Hirai Yoshihiko
    Department of Physics and Electronics Engineering, Graduate School of Engineering

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We propose an organic photodiode for radiation detection with nanoimprinted structure in p-n junction to increase the X-ray induced current. It is found that the nanoimprited structure made from lower molecular weight P3HT, less than 90 K g/mol, is dissolved by the solvent of PCBM, that is, dichloromethane (DCM), on the other hand, the structure made from high molecular weight, 300 K g/mol, is not dissolved. The effect of expanding the p-n junction using nanoimprint lithography is observed in the case of visible light and X-ray induced scintillation light irradiation.

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